A moving image compression (or encoding) device including: a hardware processing section which compresses moving image data by hardware; a data storage section which stores the moving image data processed by the hardware processing section; and a software processing section which compresses the moving image data from the data storage section by software. The hardware processing section includes a plurality of processing sections which perform processing including a discrete cosine transform and quantization of the moving image data. The software processing section performs variable-length coding of the quantized moving image data.